AL is now a cross-platform language that is deployed through an extension for Visual Studio Code. This extension not only supports deployment on Windows OSes, but is also supported for the macOS version of Visual Studio Code.
The free AL Language extension (https://marketplace.visualstudio.com/items?itemName=ms-dynamics-smb.al) is available for download from the Visual Studio Code marketplace. This provides an optimized experience for Dynamics 365 Business Central extension development, and includes all the support and tools that you need to build apps (from now on, a synonym for extension), including the debugger.
The easiest way to get the extension installed without further information is by opening any Dynamics 365 Business Central code file (.al) and following the instructions shown by Visual Studio Code when it detects that an extension...